diff --git a/pyproject.toml b/pyproject.toml
index f94d90d..b5c95c9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -77,7 +77,7 @@ Versions = "https://git.aetoskia.com/aetos/mail-intake/tags"
 
 
 [tool.setuptools]
-package-dir = { "" = "src" }
+packages = { find = { include = ["mail_intake*"] } }
 
 [tool.setuptools.packages.find]
 where = ["src"]